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Jan. 7, 1941
J. H. 'RQY
2 ,413,891
MECHANXSM PoR ALIGNING 'THE EDGEs oF SHEET MATERIAL
_Filed Dec. 29. 1944 "
l
2 sheets-sneer 1
3
.
INVENTOR
'JOSEPH H. Ro Y.
Jan.
I V
7,
MECHANISM FOR.ALI‘G‘NING’`
J. H.
THE`ROY>
EDGES OF SHEET MATERIAL
Filed Dec. 29, 1944 '
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QW@y„.|I.|l Ií
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2 Sheets-Sheèt 2
Patented Jan. 7, 194'?
2,413,891
UNITED STATES PATENT OFFICE
2,413,891
MECHANISM FOR ALIGNING THE EDGES OF
SHEET MATERIAL
Joseph H. Roy, Trenton, N. J.
Application December 29, 1944, Serial No. 570,446
21 Claims.
(C1. 112--2)
l
2
My invention relates to mechanism for align
ing the edges of material and particularly to
tion thereof in which reference is made to the
accompanying drawings.
mechanism for use with tacking machines Where
by the edges of fabric may be accurately posi«
In the drawings:
Fig. 1 is a top` plan View of a typical machine
tioned during the tacking operation.
embodying my invention with parts of the con- '
In the manufacture of various textiles, such
as worsted fabrics for example, the cloth is folded
so as to protect the face thereof during Wash
ing and other operations. At such times the edges
of the cloth are tacked together by stitching
which is subsequently removed when the fabric
has been treated. However, the edges of the
fabric are not always in alignment as they pass
from the folding machine to the tacker and at
such times it is necessary for an operator to shift
and guide the edges as they pass to the tacking
machine.
struction broken away.
l
Fig. 2 is a side view of the construction illus
trated in Fig. 1.
Fig. 3 is an end View of the construction shown
in Figs. 1 and 2.
Fig. 4 is a vertical sectional view through the
mechanism illustrated in Figs. 1 to 3 taken on
the line 4--4 of Fig. 2.
Fig. 5 is an enlarged View of a preferred form
of gripping means embodied in the construction of
Figs. 1 to 4.
It is also usual to secure successive
.
Fig. 6 is an enlarged side View of a portion of
lengths of the cloth together at their ends so
the construction illustrated in Fig. 2, and
that they pass continuously through the machines.
Fig. 7 is a plan view of those elements of the
However, the overlapping or folded ends of the 20 construction illustrated in Fig. 6.
cloth would present too thick a body of mate
In that form of my invention chosen for pur
rial for tacking and therefore the operator has to
poses >of illustration in the figures of the draw
hold these overlapping portions away from the
ings, the fabric which is to have its edges brought
tacker as they pass that machine.
into alignmentiand tacked is passed from a folder
The speed at which the fabric passes to the 25 (not shown) to the tacker 2 through mechanism
tacker is limited largely by the skill and speed
embodying the present invention. ‘The fabric is
with which the operator can handle the cloth so
moved from the right to the left as seen `in Figs.
as to perform these operations. A speed of l5
l and 2 and may be pulled through the mech
to 2O yards per minute is considered fast work
anism or otherwise advanced by means not shown.
Whereas the tacking machines and other mech 30
The edge of the upper layer of the folded cloth
anism are capable of operation at much higher
is indicated by the line 4 and is engaged by
speeds.
gripping members 6 which as shown are in the
In accordance with my invention the opera
form of pins 8 carried by a chain in which is l
tions of aligning'the edges of the fabric passing
movable longitudinally of the upper section l2
to a tacker and the displacing of the overlapping 35 of the device. The-edge of the lower layer of the
ends of successive lengths of the cloth may be
folded cloth is indicated by the line I4 and is
carried at a very high speed and the speed of
engaged by similar grippingmembers I6 carried
the entire operation of aligning and tacking `the
by a chain I8 movable longitudinally of the lower
section 2D of the device.
material may be carried out much more rapidly
than heretofore.
v
‘
40
The upper and lower sections of the device are
One of the objects of my invention is to pro
similar and each embodies a stationary portion
located adjacent the tacker 2 and a movable por
vide novel means for aligning the edges of the
material.
tion or arm which is pivotally connected to the
i Another object of my invention is to provide 45 stationary portion. The stationary portion of
the upper section l2 is shown at 22 and the arm
means which are operable `at high speed for in
of this section is shown at 24, being pivotally
suring proper alignment of the edges of fabric
connected to the stationary portion by the hinge
passing to a tacker.>
Y
25. The stationary portion of the lower section
A further object of my invention is to pro
vide means for shifting the material being tacked 50 is shown at 28, the lower arm is shown at 3ft
and the hinge 32 which connects the portions
so as to prevent overlapping end portions of suc
of the lower section is located in alignment with
cessive lengths of material from passing to the
the hinge 26 connecting the portions of the upper
tacker.
'
These and other objects and features of my
invention will appear from‘the" following descrip
section.
'
With this construction the free ends of the
55 arms 24 and 30 are independently movable to
2,413,891
follow the edges of the upper and lower layers of
the folded cloth even though the edges are dis
placed a considerable distance. On the other
hand, the hinges 28 and 32 are in alignment and
the stationary portions of the sections are se
cured together in fixed positions adjacent the
tacker with their edges parallel so that the chains
and gripping members in traveling from the free
ends of the arms toward the stationary portions
are moved into parallel relation. The grippers
thus serve to draw the edges of the cloth into
alignment so that they will pass to the tacker
in the proper position to be tacked together.`
The chains l@ and I8 pass about sprockets 34
at the free ends of the arms 2li and :wand pass
about sprockets 38 at the opposite ends of the
stationary portion of each section. The chains
are guided in their movement lengthwise of the
arms and stationary portions by means of guide
strips 38 and tu which are located respectively
on the inside and outside of the chains. |The pins
8 and I6 which constitute the gripping members
in the construction illustrated are carred by plates
42 secured to the links of the chains and project
outward from the chains beneath the edges of
4
edge of the cloth to cause it to be properly gripped
and such movement is controlled by the control
means 18 and 8€! secured to the outer ends of the
arms 2li and 3Q and operable to cause the motors
65 and 68 to be driven in forward and reverse
directions.
The control means '58 and 65 are each pro
vided with an upwardly projecting finger 82 which
is yieldably urged against the edge of the cloth
by a light spring Elli.
The cloth passes over
the upper face 36 of the control means and be
neath a weighted plate 88 which holds the cloth
down and guides it during its movement over the
face 8f3 and past the finger 82. The finger 82
is pivotally mounted at 90 and movable in oppo
site directions from the central position shown
into engagement with contact plates S2 and 94
to complete an electrical circuit including one of
the motors 65 or 5B when the linger 82 is in a
central or neutral position the motor will re
main idle and the shaft which is driven thereby
to move one of the arms will not rotate.
How
ever, upon movement of the cloth in either direc
tion, that is toward or away from the finger 82,
the linger will be moved by the cloth or by spring
3ft to cause a circuit to be completed through
the outer guide strips s3. The chains and the
one or the other of the contact plates 92 or 94
pin carrying plates ¿i2 are supported vertically
to complete a circuit for driving the motor in
by the projecting edge @EL of the lower members
forward or reverse directions whereby the shaft
46 of each section.
The chains are permitted to yield longitudi 30 connected thereto will be rotated in a direction
to move the arm so that it will follow the cloth.
nally upon movement of the arms about the
When the motor is energized it will continue to
hinges 26 and 32 by means of springs ¿8 which
operate and move the arm connected thereto until
urge the sprockets
to the left as seen in Fig. 2
the cloth permits or causes the finger 82 to move
so as to hold the chains reasonably taut while
back to its neutral position. The arm will then
permitting limited movement of the sprockets.
remain in its new position until the cloth has
For this purpose one end of each spring A8 bears
again shifted to cause the motor to be operated
against a washer 50 on the inner end of a bolt
again and the shaft rotated to move the arm in
52 carried by the spacing member 541 on the end
one direction or another.
of the stationary portion of the section. The
Each arm is thus controlled s0 that it will move
opposite end of the spring presses against the 40
to follow the edge of the cloth with which it is
U-shaped member 5e connected to the shaft 53
associated and the gripping members on the
about which the sprocket 35 rotates. The shafts
chains therefore will always be presented so as
.58.for each sprocket are independently movable
to engage the cloth adjacent its edge. Moreover,
and extend through slots 69 in the upper mem
after the cloth is once gripped the movement of
bers 62. and lower members 46 of each stationary
the chains longitudinally from the free ends of
section so as to hold the shafts vertical and keep
the arms toward the stationary portion 0f the
the sprockets in proper position to receive and
sections causes the edges of the cloth to be drawn
guide the chains.
into parallel positions so that they are properly
The device described is mounted on a suitable
support such as that shown at 6G which may also 50 aligned for tacking purposes.
The upper faces 86 of the control members are
be the support for the tacker 2 or other elements
of the- combination. Reversible motors Se and E3
are mounted on the supporter@ and drive thread
located above the gripping members or pins 8
and i6 whereby the cloth passing from the faces
86 is located above the pins but is positioned to
ed shafts fil and 12 which are connected to the
free ends of the arms 2è and‘ßû by means of the 55 be pressed downward so as to be penetrated by
the pins by means of the wire brushes or other
internally threaded yokes lll. The yokes are ro
tatable with respect to the arms by which they
pressing members 96. The cloth is thus firmly
are carried and are slidable longitudinally of the
gripped and directed as it moves toward the
arms so that the arms may move in an arc about
stationary portions of the sections.
'
On approaching the opposite end of the sta
the hinges 2% and 32 on rotation of theV threaded 60
tionary portion of each section the chain and
shafts lll and l2. For this purpose the yokes
pins are depressed by the downwardly inclined
are rotatably mounted on plates ‘E6 which in turn
surfaces 98 of the chain guiding strips 40 to with
are slidably movable along tracks ‘i8 carried by
draw the pins from the cloth. The cloth in turn
the arms 24 and 3E) and extending longitudinally
thereof. The shaft li) and the yoke 'ill on arm 65 is raised from the pins by passing over the roll
211l are located above the arm and above the up
per layer il of the folded cloth whereas the shaft
'l2 and the yoke ‘M on arm 3Q are located below
ers lílli4 mounted on a bracket |62 secured to the
stationary portion of the upper and lower sec
tions of the device. After passing over the roll
ers l D0 the edges of the cloth pass beneath a roller
70 i011 vcarried on an arm IOS and are thus accurate
ly aligned and are brought into contact so that
tion serves to move the arms 24 and 3u in one
they pass to the tacker in proper position for per
direction whereas rotation of the shafts in the
forming the tacking operation.
opposite direction will move thearms in the oppo
In order to prevent the overlapping or folded
site direction. Each arm and shaft preferably
is moved independently so that it will follow the 75 portions of material at the ends of successive
the lower layer i4 of the cloth.
Rotation of the shafts 'lû and 'i2 in'one direc
5
2,413,891
lengths of cloth from passing to the tacker the
device also includes “a means for moving the
cloth away from the tacker when these portions
approach the tacker. For thispurpose the cloth
moving from the roller |02 to the tacker 2 passes
beneath the overhanging plate |08 of a rotatable
member H0. The member ||0 is provided with
an eccentric element | l2 which is formed to move
the edge of the cloth from the tacking position
indicated by the line A in Fig. 7 to the displaced
position indicated by the line B, upon rotation
of the member I I0 in a counter clockwise direc
tion.
The member ||0 is caused to rotate in a coun
ter clockwise direction by means of the foot ||4
carried by the spring pressed arm IIB mounted
on the stationary portion 22 of the upper sec
tion of the device. The foot ||4 is pivotally
mounted at ||8 and the heel I 20 thereof is so
formed that upon passage of a thick folded or
overlapping portion of the cloth beneath the foot,
the heel will be engaged and the foot rotated to
the dotted line position shown in Fig. 6. The
toe |22 of the foot is thus raised and serves to
pull on the cable |24 which passes beneath a sta
tionary roller |26 and is connected to the mem
ber ||0 at |28.
The folded portion of the cloth in moving past
the foot ||4 thereby serves to rotate the member
|í0 and shifts the edges of the cloth from the u
tacking position of line A to the disengaged po
sition of line B so that the folds in the cloth will
not pass to the tacker.
The cloth is returned to the tacking position
oi line A by means of a similar foot |30 mounted
on an upright |32 carried by the supporting plate
6
|44 is connected to a switch |52 to cause a sig- ,
nal to be given when the free end |48 moves to
the dotted line position of Fig. 7 due to failure
ofv the cloth to be properly tacked. The member
|44 is prevented from moving outward when the
cloth is displaced by the eccentric element ||.2
by means of the cam portion |54 of the member
||0 which engages the member |44 and holds it
in the full line position of Fig. 7.
The operation of the device described above is
as follows: The cloth or other material being
handled is passed through the device from right
l to left from a folder or the like to means which
pull the cloth through the device described. The
upper layer of the folded cloth passes over the
face 86 of the control means 18 and beneath
the weighted plate 88 with the edge of the cloth
in contact with the ñnger v82. The cloth then
passes beneath the brush 96 which presses the
edge of the cloth downward into contact with the
pins 8 carried by the chain |0 on the upper sec~
tion of the device. The edge of the lower layer
of the folded cloth is similarly passed over the
upper face of the control means 80 carried by the
lower arm 30 and is pressed against the pins I6
on the lower chain I8.
The cloth in being drawn through the device in
contact with the lingers 82 holds the lingers in
a neutral position as long as the edges of the
cloth are in alignment as they approach the de
vice. However, if either edge of the cloth is dis
placed it will serve to complete a contact through
either one or the other of the contact plates 92
or 94.
As soon as such a contact is made the
motor 66 or 68 will be energized to rotate the
shaft 10 or 'I2 to move the free end of the arm
|34. The foot |30 is provided with a cable |36
24 or 30 so that it will follow the edge of the cloth
which passes over the roller |38 and is connected
until the ñnger 82 has again been restored to its
to the member I I0 so that upon movement of the
neutral position. The free ends of the arms 24
folded portion of the cloth past the foot |30 the 40 and 32 are thus actuated as to insure gripping
member ||0 is turned in a clockwise direction
of the edges of the cloth by the gripping members
and the eccentric element ||2 is restored to the
or pins in either correct or displaced positions of
full line position of Fig. 7 to allow the cloth again
the cloth. The edges of the cloth are then moved
to move to the tackingposition of line A as it is
with the gripping members longitudinally of the
pulled through the device.
arms to the aligned hinges 26 and 32 and the
With this construction the device performs all
edges then travel in parallel and aligned rela
of the operations heretofore performed by hand
tion-along the stationary portions of the sections.
and the cloth can be pulled or passed through
On reaching the opposite end of the stationary
the device at any desired speed. Moreover, the
operations are all performed positively and with 50 sections the edges of the cloth are disengaged
from the pins or gripping members and are
certainty so that delays and accidents due to the
brought into contact and passed beneath the
limitations of the operator are eliminated from
roller |04. The- aligned and contacting edges
the system.
of the cloth then pass beneath the edge of plate
In using the apparatus described additional
|08 on the member ||0 and in contact with the
safety features can also be provided. Thus, as
eccentric element ||2. The edges of the cloth
shown in Figs. 1 and 2, a control switch may be
are thus located as indicated by the line A in
located at |40 and actuated by an arm |42 which
Fig.
7 and are presented to the tacker 2 in aligned
is yieldably urged against the upper layer of the
positions for proper tacking of the edges of the
folded cloth. When the end of a length of cloth
has passed the arm |42, or in the event the cloth 60 cloth. Y
When an overlapping or folded portion con
should not be received and held by the gripping
members for any reason, the arm |42 will move
necting successive lengths of cloth, approaches
the tacker it engages the heel |20 of the foot ||4
and causes the toe of the foot to be raised there
to be stopped or cause an alarm or signal lamp 65 by turning the member | I0 so that the eccentric
to be energized.
'
element ||2 will displace the edges of the cloth
and move them from the tacking position to the
In a like manner means may be provided to
give a signal or alarm in the event the tacker
displaced position indicated by the line B so that
should run out of thread or fail to tack the cloth
the folded portions will not be tacked. There
properly for any other reason. As shown, this 70 after when the folded portions reach the foot“
may be accomplished by providing a member |44
|30 they actuate the foot to return the member
which is pivotally mounted at |46 and has a free
||0 to the original tacking position of Fig. 7 and
end |48 which acts as a feeler and is urged by a
the edges ofthe cloth'are again presented to the
spring |50 against the tacked portion of the cloth
tacker in the proper aligned positions4 for tack
beyond the taoker 2. The opposite end of member 75 ing. The return of the cloth to the tacking
downward by gravity or otherwise to actuate
switch |40 and cause the movement of the cloth
2,413,891
7
position is assured by pulling the cloth through
the device.
In the event the cloth is not properly gripped
by the gripping members or should be disengaged
from the pins the arm |42 of the control switch
|48 which normally engages the cloth will be al
lowed to move downward to the dotted line posi
S
rial terminating adjacent said parallel guides for
directing said gripping members to said parallel
guides on movement of said members with said
layers of material.
6. A device for aligning the edges of traveling
layers or” material comprising gripping members
engageable with each layer of material and mov
able therewith, parallel guides for the gripping
members which engage diiîerent layers of mate
actuated and the mechanism stopped to prevent
improper tacking of the cloth. Furthermore, if 10 rial, movable guides for directing said gripping
members tosaid parallel guides, and means for
the tacker should run out of thread or should fail
moving said movable guides -on displacement of
to tack the cloth properly the member Hifi ad
the edges of said layers of material.
jacent the tacker will move outward so as to actu- .
7. A device for aligning the edges of traveling
ate the switch |52 and give the desired alarm or
stop the operation so that the tacker may be re 15 layers of material comprising gripping members
engageable with each layer of material and mov
plenished with thread or the failure of the mech
able therewith, parallel guides for the gripping
anism corrected.
»
members which engage different layers of mate
The safety devices described and shown may
rial, movable guides for directing said gripping
be omitted or altered in form and other types
members to said parallel guides, elements en
of gripping and control means may be used if
tion of Fig. 1 and cause an alarm or signal to be
desired. Moreover, the invention is not limited
to its operation in aligning the edges of cloth
but may be employed in handling and aligning
other materials and may be used in combination
with various other devices and in other indus
tries. These and other changes and modifica
tions may be made in the form, construction and
gageable by the edges of material which are to
be aligned, and means controiled by said elements
for moving said movable guides upon displace
ment of the edges of the material to be aligned.
8. A device for aligning the edges of traveling
layers of material comprising gripping members
engageable Iwith each layer of material and mov
able therewith, chains by which said gripping
members are carried, stationary members carry
invention. In view thereof it should be under 30 ing sprockets about which said chains pass and
having parallel guide means thereon for holding
stood that the particular form of my invention
the portions of said chains and gripping mem
herein shown and described is intended to be
illustrative only and is not intended to limit the
bers adjacent thereto in parallel relation, mov
able arms pivotally connected to said stationary
scope of my invention.
arrangement of the elements employed and in
the methods of operating devices embodying my
I claim:
.
members and having sprockets thereon about
engageable with each layer of material and mov
able therewith, and means responsive to the dis
which said chains pass, said arms having guide
means thereon for directing the chains and grip
ping members toward said stationary guides to
align the edges of the material engaged by said
placement oi the edges of said layers for moving
gripping members.
gripping members engaging different layers of
material into alignment.
9. A device for aligning the edges of traveling
layers of material comprising gripping members
2. A device for aligning the edges of traveling
layers of material comprising gripping members
engageable with each layer1 of material and mov
engageable with each layer of material and mov
members are carried, stationary members carry
ing sprockets about Which said chains pass and
having parallel guide means thereon for hold
ing the portions of said chains and gripping mem
bers adjacent thereto in parallel relation, mov
able arms pivotally connected to said stationary
members and having sprockets thereon about
which said chains pass, said arms having guide
means thereon for directing the chains and grip
l. A device for aligning the edges of traveling
layers of material comprising gripping members
able therewith, supports for said gripping mem
bers, means for moving said supports upc-n dis
placementJ of the edges oi said material, and
means for moving gripping members engaging
different layers of material into alignment.
3. A device for aligning the edges of traveling
layers of material comprising gripping members
engageable with each layer of material and mov
able therewith, supports for said gripping mem
bers, means comprising elements engageable by
the edges of said layers of material for moving
said supports upon displacement of said edges,
and means for moving gripping members engag
ing different layers of material into alignment.
able therewith, chains by which said gripping
ping members toward said stationary guides to
align the edges of the material engaged by said
gripping members, and means for moving the free
ends of said arms upon displacement of said edges
ofsaid material.
l0. A device for aligning the edges of traveling
»'l. A device for aligning the edges of traveling 60 layers of material comprising gripping members
engageable with each layer of material and mov
able therewith, chains by which said gripping
engageable with said material and movable there
layers of _material comprising gripping members
with, parallel guides for the gripping members
which engage diiîerent layers of material and
means movable in response to displacement of the
edges of said layers of material for directing said
gripping members to said parallel guides on move
ment of said members with said layers of mate
rial.
5. A device for aligning the' edges of traveling
layers of material comprising gripping members
engageabie with each layer of material and mov
able therewith, parallel guides for said gripping
members, and guides movable in response to dis
placement of the edges of said layers' of mate
members are carried, stationary member carrying
sprockets about which said chains pass and hav
ing parallel guide means thereon for holding the
portions of said chains and gripping members ad
jacent thereto in parallel relation, movable arms
pivotally connected to said stationary members
and having sprockets thereon about which said
chains pass, said arms having guide means there
on for directing the chains and gripping members
toward said stationary guides to align the edges
of the material engaged by said gripping mem
bers, elements carried by said arms and engage
able by the edges of the material to be aligned
9
2,413,891
and means controlled by said elements for mov
ing the free ends of said arms upon displacement
of said edges of the material.
l1. In combination with a tacker for securing
the edges of layers of cloth together, means for
aligning said edges as they are moved to the
tacker including gripping members engageable
with each layer of cloth in advance of said tacker
and movable therewith toward the tacker and
guide means movable in response to displacement
of said layers of material for directing said grip
ping members into aligned positions on move
ment thereof.
12. In combination with a taclier for securing
the edges of layers of cloth together, means for
aligning said edges as they move vto the tacker
comprising gripping members engageable with
the cloth adjacent the edges to be aligned and
movable With the cloth as it moves toward the
tacker, means for connecting those gripping
members Which engage the same layer of cloth,
guide means for said connecting means located
adjacent the tacker and arranged in parallel re
lation, and means pivotally connected to said
guide means and spaced from said tacker for di
recting said connecting means and gripping mem
bers toward said guide means.
13. In combinatioin with a tacker for securing
the edges of layers of cloth together, means for
. aligning said edges as they move to the tacker _
comprising gripping members engageable with
the cloth adjacent thD edges to be aligned and
movable with the cloth as it moves toward the
tacker, means for connecting those gripping
members which engage the same layer of cloth, ,
guide means for said connecting means located
adjacent the tacker and arranged in parallel re
lation, and arms spaced from said tacker and piv
otally mounted adjacent said guide means for
means connected to said arms for moving the
same upon displacement of the edges of the cloth,
and elements engageable by the edges of the cloth
contro-lling movement 0f said arms.
16. In combination with a tacker, means for
aligning edges of layers of cloth being advanced
to the tacker, means for locating said edges in
position to be tacked by the tacker, and means
actuated by raised folds in the cloth for displac
ing the edges of the lcloth with respect to the
tacker Whenl said folds approach the tacker.
17. In combination with a tacker, means for
aligning edges of layers of cloth being advanced
to the tacker, means for locating said edges in
position to be tacked by the tacker, means actu
ated by raised folds in the cloth for displacing
the edges of the cloth with respect to the tacker
when said folds approach the tacker, and means
for returning said edges of the clotliL to said po
sition to be tacked.
'
18. In combination with a tacker, mechanism
for controlling the position of the edges of lay
ers of cloth being moved to the tacker compris
ing means for gripping the edges of said layers,
means located in advance of the tacker for mov
ing said gripping means to align said edges, and
means actuated by raised folds of cloth in said
layers for displacing said folds with respect to
said tacker.
19. A device for aligning the edges of'travel
ing layers of material, comprising gripping mem
bers engageable with each layer of material and
movable therewith, endless chains carrying said
gripping members, stationary members having
means thereon for holding said chains and grip
ping members in parallel position, movable arms
pivotally connected to said stationary members
and having guide means thereon to direct the
chains and gripping members toward said sta
supporting a portion of said connecting means,
the free ends of said arms being movable to follow 40 tionary members, and means for moving said arms
to follow the edges of the material in response
the edges of the cloth on displacement thereof.
to the displacement of said edges, comprising
14. In combination with a tacker for securing
the edges of layers of cloth together, means for
aligning said edges as they move to the tacker
comprising gripping members engageable with
the cloth adjacent the edges to be aligned and
movable with the cloth as it moves toward the
tacker, means for connecting those gripping
members which engage the same layer of cloth,
guide means for said connecting means located
adjacent the tacker and arranged in parallel re
movable linger elements carried by said arms and
urged toward the edges of said material and a
reversible motor associated with each movable
arm for controlling the movement of said arms
and responsive to the movements of said fingers.
2‘0. In combination With a tacker, mechanism
for controlling the position of the edges of lay
ers of cloth being moved to the tacker, compris
ing means for gripping the edges of said layers,
lation, arms space-d from said tacker and pivot
means located in advance of the tacker for mov
ally mounted adjacent said guide means for sup
ing said gripping means to align said edges, and
porting a portion of Said connecting means, the
means actuated by raised folds of cloth in said
free ends of said arms being movable to follow
layers for displacing said folds with respect to
the edges or the cloth on displacement thereof,
said tacker, comprising control elements located
and means connected to said arms for moving the
in advance of the tacking position actuated by
same upon displacement of the edges of the cloth.
said raised folds, eccentric elements to move edges
15. In combination with a tacker for securing
containing said raised folds from the tacking po
the edges of layers of cloth together, means for Gi) sition, and connecting means between the con
aligning said edges as they move to the tacker
trol elements, and means for returning said edges
comprising gripping members engageable with
of material to the proper tacking position.
the cloth adjacent the edges to be aligned and
2l. A device for arranging the edges of travel
movable with the cloth as, it moves toward the
ing layers of sheet material in predetermined
tacker, means for connecting those gripping
members which engage the same layer of cloth,
guide means for said connecting means located
adjacent the tacker and arranged in parallel re
lation, arms spaced from said tacker and pivot
ally mounted adjacent said guide means for sup
porting a portion of said connecting means, the
free ends of said arms being movable to follow
the edges of the cloth on displacement thereof,
relation, comprising gripping members engage
able with the material of each layer and movable
therewith, control means engageable with said
layers and responsive to displacement of the edges
thereof, and means actuated by said control means
for moving said gripping members to arrange the
edges of said layers in said predetermined rela
tion.`
JOSEPH H. ROY`
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